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Mercury poisoning is a type of metal poisoning due to exposure to mercury. [ 3 ] Symptoms depend upon the type, dose, method, and duration of exposure. [ 3 ][ 4 ] They may include muscle weakness, poor coordination, numbness in the hands and feet, skin rashes, anxiety, memory problems, trouble speaking, trouble hearing, or trouble seeing. [ 1 ]
The types of fish to eat are categorized based on the mercury levels found in fish and the risk to human health. Mercury regulation in the United States limit the maximum concentrations of mercury (Hg) that is permitted in air, water, soil, food and drugs. The regulations are promulgated by agencies such as the Environmental Protection Agency ...
The presence of mercury in fish is a health concern for people who eat them, especially for women who are or may become pregnant, nursing mothers, and young children. Fish and shellfish concentrate mercury in their bodies, often in the form of methylmercury, a highly toxic organomercury compound.
Currently, EPA has set the "safe" mercury exposure level to be at 5.8 μg of mercury per one liter of blood. [86] While mercury fillings themselves do not increase mercury levels above "safe" levels, they have been shown to contribute to such increase. However, such studies were unable to find any negative neurobehavioral effects. [87] [86] [88]
Minamata disease is a neurological disease caused by severe mercury poisoning. Signs and symptoms include ataxia, numbness in the hands and feet, general muscle weakness, loss of peripheral vision, and damage to hearing and speech. In extreme cases, insanity, paralysis, coma, and death follow within weeks of the onset of symptoms.
Clay lake, the first major lake downstream from the Dryden mill, had extremely high mercury levels in predatory fish such as the walleye. [5]: 62 [4]: 2207 These fish, which have been a staple food of First Nations people for generations, [6] became unsafe to eat. [7] Grassy Narrows and Whitedog First Nation communities were severely affected.
Erethism, [n 1] also known as erethismus mercurialis, mad hatter disease, or mad hatter syndrome, is a neurological disorder which affects the whole central nervous system, as well as a symptom complex, derived from mercury poisoning. Erethism is characterized by behavioral changes such as irritability, low self-confidence, depression, apathy ...
Mercury can bioaccumulate in marine food chains in the form of highly toxic methylmercury which can cause health risks to human seafood consumers. [5] [6] According to statistics, about 66% of global fish consumption comes from the ocean. Therefore, it is important to monitor and regulate oceanic mercury levels to prevent more and more mercury ...